Jacob Cheverie
Aerospace
- May 14, 2019
- 77
I have a print that has a composite position tolerance on one feature of size. Y14.5-2018 contains section 10.5 titled "Pattern Location" that goes on to discuss composite positional tolerancing and multiple single segment positional tolerancing.
Is it valid to have a composite positional tolerance on a single feature of size and not a pattern? The explanations in Y14.5 imply that a pattern is required. It makes sense to me that it wouldn't apply to a single FOS, just trying to get some other opinions.
The next point of interest to me is multiple single segment positional tolerances. This description is also grouped into 10.5 "Pattern Location" and the wording seems to imply that you can only apply multiple single segments to a pattern. This doesn't make sense to me, but perhaps I am just not seeing it clearly.
Is it valid to have a composite positional tolerance on a single feature of size and not a pattern? The explanations in Y14.5 imply that a pattern is required. It makes sense to me that it wouldn't apply to a single FOS, just trying to get some other opinions.
The next point of interest to me is multiple single segment positional tolerances. This description is also grouped into 10.5 "Pattern Location" and the wording seems to imply that you can only apply multiple single segments to a pattern. This doesn't make sense to me, but perhaps I am just not seeing it clearly.